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  4. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 . In the nitrating mixture HNO3 acts as a

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Q. Nitrobenzene can be prepared from benzene by using a mixture of conc. $HNO_{3}$ and conc. $H_{2}SO_{4}$ . In the nitrating mixture $HNO_{3}$ acts as a

NTA AbhyasNTA Abhyas 2022

Solution:

$H_{2}SO_{4} \rightarrow HSO_{4}^{ -}+H^{+}$
$H^{+}+HO-NO_{2} \rightarrow \left[\right.H_{2}O^{+}-NO_{2}\left]\right. \rightarrow H_{2}O+NO_{2}^{ +}$ ,
Therefore option $\left(A\right)$ is correct.